Geography and Spatial Information
From Government Linked Data (GLD) Working Group Wiki
Deliverables: Standard Vocabularies 2.3.5 of the GLD WG Charter addresses the use of standard vocabularies for handling geographic concepts and geospatial data.
These describe types of features, e.g. named topographic/planimetric features and points of interest.
Additional considerations include vocabularies for describing coordinate systems, datums, projections and other components of spatial reference systems. Here, efforts such as those by the EPSG can be leveraged and reused, along with standard approaches such as Well Known Text (WKT).
- David G. Smith, US EPA and John Goodwin, UK Ordnance Survey originally contributed to this wiki page.
Types of features:
- Political and Administrative Boundaries
- and other terminologies, e.g. along lines of efforts by UK Ordnance Survey and US FGDC A-16 Framework Data Themes
Various boundaries types are reflected in the Cadastre and land administration thesaurus CaLAThe, which comprises of about 120 English terms, including mappings to the GEMET thesaurus, the AGROVOC thesaurus, and the STW Thesaurus for Economics. The thesaurus is available from www.cadastralvocabulary.org, which besides term search allows for alphabetical listing, graphical overview (in terms of .svg-files), and tabular overview.
Ongoing Linked Data Efforts in Geographic Terminology
Notable efforts in government to develop ontologies for geographic features include:
- GB Ordnance Survey
- USGS National Map
These describe feature geometry, e.g. point/line/polygon/topology/surface and other types of entities that would typically be represented via GIS or remote sensing data structures.
- Simple Features, e.g. WGS84 lat/long
- Complex Geodata, e.g. polygonal data
- Spatial reference systems, e.g. EPSG and other designators for spatial reference systems
Tools and efforts
- GeoVocab 
- GeoSPARQL 
- Ordnance Survey Spatial Relations ontology 
- Ordnance Survey Geometry ontology 
- NeoGeo Vocab 
- Geometry NeoGeo 
- Spatial NeoGeo 
- GADM project 
- EU's ISA Programme Core Vocabularies Working Group is working with technical coordinators of the EU INSPIRE Directive and several others on defining a core vocabulary including the minimal set of terms necessary to describe an address/location (those are not the same of course - that's the interesting bit). Output will be interop with INSPIRE. See resources in sub-list:
- INSPIRE Data Specifications on Addresses - Guidelines v 3.0.1
- AT Postal Address
- NEPOMUK Contact Ontology
- EURADIN: European Addresses Infrastructure
- ISO project 19160 Addressing (open ISO/TC211 website) links to& address standards and resources
- ISO/TC211 Workshop on Address Standards, Copenhagen, May 2008
- Danish Addressing incl. feature types
Action Item: support 2.3.5 - Standard Vocabularies - (optional) Geography, Spatial Information - Chris Musialek (GSA), Dave G. Smith (EPA), Todd Pehle (Orbis). Retrieved from "http://www.w3.org/2011/gld/wiki/Meetings:Telecon2011.07.07"